Brake head



H. E. ANDERsoN 21,004,743 1 BRAKE HEAD June 1l, 1935.

Filed Jan. 2, 1955 2 ASheets-*Sheet 2 INVENTOR.

" HARLEY E. HNDEHSON.

wrm

ATTORNEYS.

Patented June 11, 19735V UNITED .STATES- "Pulzlv'r s OFFICE BRAKE HED yA Harley E. Anderson, Chicago, Ill., assigner of onehalf to John H.Sharp, Chicago, Ill.

' A Applr'mtvon January 13 Claims.

considerable time and expense lis'involved in vthe repair andmaintenance of brake gear, and particularly of the brake heads thereof,due to the wearing away of the shoe supporting lugs of the head, whichfrequently occurs when other portions of the head are still inserviceable condition. 1

As provided in the Code of Rules-of the American Railway. Association,Rule ,63, Sec. 5 (c), ""v1"he brake ybeams should be considered asrequiring'renewal when theV distance betweenupper and'lower brakeshoefsupporting) lugs measures v21/4 inches or morevat face of head, ando'winfr to other provisions of `the code embodying safetymeasures,-such, for ex,- ample, as the spreading or riveting of the endsofl the 'tension members or rods overthe nuts positioned thereon outsidethe `brake heads, such jrenewals cannot readily be made until theentire'fbrake beam is'emovedfrom the car, and at the expense ofconsiderable vtime and labor. AThese code requirements practicallyprohibit the repair and/or replacement `of brake heads while a carY isin service, and in order `to replace the brake headsjwhen" thelugs areworn to V`or beyond the limits prescribed by the code, it is necessary-t0 send a car to the Shop, drop the brake beam, remove the riveted endsof the Itension rods and replace the brake head, Ywhich means that a carmust be taken `outy of service VVand sent to the Yrepair tracks, all ofwhichA involves considerablerexpense in time, zmaterial and labor, andin'loss of ear. service ,while refpairs arebeingmade. n. l I y l Oneobject, therefore, of the presentginvention isto provide a novelstructurewhich will mateyrially]lengthen Ythe life of brake heads, andvwhich will materially lessen the necessity of Vbrake head repairs andreplacements.

, Another object of.V the invention is to provide a Vstructure whereinthewearing away of brake head lugs by the movement of fbrake shoe lugsthereon maybe compensated for at a minimum expense of time, labor,material and Yloss of car service. ,4 y

Another, object of the invention is to provide 'a-Lnovel constructionand arrangement whereby dangerously worn brake equipment may be put 2,1935, serial No. 45

,safe condition, and suitable repairs lmade Without taking a car out ofservice.

, Another object of the invention is to provide a structure which willreduce Ythe necessity .of f

shop `repairs on brake heads by at least onehalf; r

Another object of the invention is to provide .a construction andarrangement whereby the wear receiving surfaces of a brake headstrucyturemay behardened, thereby further improving, and, materiallylengthening the life of brake heads Yand associated brake shoesupporting parts. A further object of theinvention isV to provide aVstructure whereby badly worn brake v equipment may be put in safecondition even vwhile a car is in transit. I y A stilly further objectof the invention is to gimprovedevices of the character( described insundry details hereinafter referred to and particularly pointed out inthe appended claims. y One embodiment of the present vinvention is shownforillustrative purposes in the accompanying drawings, in which:

Fig. 1 isa vertical sectional elevationalview through a brake head andshoe therefor, taken Vsubstantially asindicated by the lines l-I ofFigs. 2 and 3, and illustrating the application of the vpresentvinvention thereto; K

Fig. 2 is a transverse sectional plan View taken 'si'ibstantiallyy asindicated bythe line C-C of' Fig. 1;

Fig. 3 is a 4transverse sectional plan view taken substantially Aasindicated lby the lines fshown, in the :present instance, as ofsubstantially annular form, and adapted to receive a projection ortrunnion l, preferably of Vcylindrical form, in a manner to rotatetherein, the projection 1,;in the present instance, being shown asformed integrally with a supporting lug,l indicated as a whole by thenumeralV 8, and having a plurality of wear surfaces 9 and Il Aformedthereon and adapted to be positioned with reflike manner.

"erenceto a brake shoe lug l2 formed on a brake shoel in a manner tosupport the shoe on the brake head 5.

For Vsecuring thetrunnion l and supporting lug A against accidentaldisplacement with respect to the brake head 5, the trunnion 1, in thepresent instance, is provided. with any annular `groove i4, and mountedin the head 5 and extending, preferably, tangentially to the groove Yillis a pin i5, a portion Vof which is adapted to extend into the groove I4in a manner to prevent longitudinal movement'of the trunnion 1, and atthe same time to'permit rotation thereof within the socket or recess 6formed in the brake head 5, the ends of the pin, being, preferably,V

headed as indicated at|*6 to secure theV pin` against displacement withrespect to the head 5.

As is kwell known by persons-familiar with' the operation of railwaysandthe maintenance -of equipment therefor, the weight iand vibra-AV tionof brake shoes produces considerable and -rapid wear, particularly onthe brake` head'lugs provided for supporting the shoes, and it willbeobserved from theforegoing description V'of thev lug 8`. and V'itsassociatedfparts, that'when one brake shoe supportingY Wearsurface,such, for example, as that indicated at 9, has become 'worn' to thedanger point, or to the extent specified by the American RailwayAssociation Code of Rules, the brake shoe key 'I1 for securing a shoe i3 tothe head 5, may be removed, and

Yupon removalof thebrake shoe from the head, the lug 8 may be turned,inthe present instance,

through an arc of approximately 180"'in a manner to position the brakeshoe supporting wear surface Il of thelug in brake shoe `lug engaging orsupporting position,.thereby replacing the worn surface Bjwith an'unworn surface and permitting the continued operation of theequipment'until the surface Il It Awill be observed that by such anarrangement,.the"life ofthe brake shoe supporting `lug v is at leastdoubled,.and that such replacement of worn surfaces may bek made evenWhile acar equipped with the present invention isin transit.

ItfWill be observed also that when all the brake shoe supportingwear-resisting surfaces'of the lug 8 have'been utilized, the headedpox'- vtion i6 of the pin I5Jmay be removedl andthe pin withdrawnfromthe head 5, after Vwhich the Yworn lug `and associated` trunnion may beremoved and replaced with a new lug having unworn Vbrake shoeVsupporting Wear surfaces, and a new pin inserted and headed to securethe newlug against displacement with respect to the head.Y Y

By reason of such an arrangement, the same head may becontinuouslyusedin service until such'time as Wear on. other portionsthereof necessitate its removal, whereas in brake head Y- construction,at present in use, therwearing awayl of the supporting lug, which atpresent is-formed integrally with the brake `l`1ead,.necessitates VJtheentire removal and discarding of `the brake beam upon'which the Worn.brake headismounted,

which'means the sending of a car to the repairk track to remove thecondemned brake beam and replace same with new beams and heads, whilethe old beam With the `Worn head is sent to the shop to be repaired,which requires the removal ofY the riveted or headed end portion,indicated at I8, of the tension member or rod I9 inV order toremove orreplacethe Worn heads,` all of which involves considerable expense in'material,

has become Worn in f l2,004,743 g e ture maybe substituted for the upperlug 2l Yif found desirable, and while the lug 8 is shownv and describedas provided With two -brake shoe supporting and wear resisting surfacesindicated at 9 and I l,-it will be obvious that undervarying conditions,additional surfaces may be provided if found desirable.

It will be apparent from the foregoing description that the presentinvention provides a novel construction and Varrangement whereby thelife of brake heads andsupporting Vlugs is materially lengthened, andwhereby Vthe .necessity of brake head repairs is ymaterially lessened.

Furthermore, Vthe Apresent invention provides aV construction andlarrangement whereby replacement of 'supporting lugs may be made withouty discardingv the brake head, and Ywherein dangerously worn surfaces ofthe supporting, lugs may be replaced Ywithout taking a car out ofservice.

` Obviously, the present invention'is-n'otlimited to the precise*constructionY andV arrangement shown and described as vthe same vmaylbe variously modified. Moreover, al1 the features and advantageousaspects of the presentv invention need not be used conjointly, as thesame may be binations kand sub'-cmbinations.r

What I claim as newV and desire to Letters Patentl is: f

used to advantage in variously Vdifferent ceni-V secure by lug havinga'pluralityfof brake. shoe supporting vsaid head for positioning Sidsurfaces in brake shoe supporting position.

2. An Yarticle of the class described comprising a brake head, an'd aybrake-shoe `supporting wear surfaces, said lug-'being movably Ymountedonsaid head'for interchangeably positioning the respectivewear's'urfaces in brake ,shoe supportingk position. Y v f,

3: An article of the classdescribed comprising a brake head, a brake'shoersupporting 'lug Yhavinga plurality of brakeshoe supporting wearsurfaces, saidy lug being removably Ymounted in said head forinterchangeably vpositioning the respectivewear surfaces inrfbrake shoesupport- Ying position. j j I 4."An articleof the classdescribedcomprising a brake head, anda brakeshoe supporting lugy havinga plurality of brake shoe support.-

ing wear,v surfaces, said'lug, beingv rotatably 'mounted on said headVforinterchangeably po-` sitioning the respective wear surfacesin brakeshoe supporting position. 7' j 5. VAn article 'of theclass describedcomprising a brake "head, and a brakeVV ,shoe'supporting lug having aplurality of brake' shoe lugV engaging surfaces thereon, said supportinglug being 1. An article of the `class deseribedfcomprising a'brake head,and a brake-shoe supporting surfaces,l said lug beingV movably mounted011145 Y -lug having a plurahty of brake shoersupporting vrotatablyamounted' on saidfhead for selectively 75 positioning the respectivesurfaces in brake shoe lug engaging position.

6. An article of the class describedy comprising a brake head, and apair. of lugs on the face and adjacent the central portion of said head,one of said lugs having a plurality of sup.-

porting wear surfaces and being rotatably Y mounted on the head forpositioning one or another of said surfaces adjacent the other of saidlugs.

7. An article of the class described, comprising a brake head, a pair ofspaced lugs on the face and adjacent the central portion of said head,one of said lugs having a pair of supporting Wear :surfaces an'd beingrotatably mounted on the head for positioning one or lthe other of saidsurfaces adjacent the other of said lugs, and means for securing saidrotatable. lug against displacement with respect to said head. u

8. An article of the class described, comprising a brake head, a pair ofvertically spaced lugs on' the face and adjacent the central portion ofsaid head,vthe lower of said lugs having a pair of supporting Wearsurfaces and being rotatably mounted on the head' for positioning one orthe other of said surfaces adjacent the upper lug, and means forsecuring said lower lug against displacement with respect to said head.f

9. A brake head having a recess formed therein, a supporting lug havinga plurality of Wear surfaces and a projection movably mounted in saidrecess, and means operatively related to said projection and head forsecuring the projection and lug against removal from said head.

10. A brake head having a recess formed therein, a supporting lug havinga plurality of Wear surfaces and a trunnion rotatably mounted in saidrecess, and a pin engageable with said trunnion and head for securingthe trunnion against removal from said head. k

11. A brake head having a recess, formed therein, a supporting lughaving a plurality of wear'surfaces and an annularly grooved trunnionrotatably mounted in said recess, and a pin operatively related to thegroove in said trunnion and to said head for securing the trunnion andlug against removal from said' head.

V12. A brake head having an annular recessl formed therein, a supportinglug having a plurality of Wear surfaces and an annularly groovedtrunnion rotatably mounted in said recess, and a pin mounted in saidhead and positioned in the groove formed in said trunnion for securingthe trunnion insaid recess and permitting rotation ofthe trunnion andlug with respect to said head.

13. A brake head having an annular `recess formed therein, a supportinglug having a pair of Wear surfaces and an annularly grooved trunnionrotatably mounted in said recess, and a pin mounted in said head andpositioned in and extending tangentially of the groove formed in saidtrunnion for securing lthe trunnion in sa'id recess andrpermittingrotation of the trunnion and lug with respect to said head for posi inoperative position.

HARLEY E. ANDERSON.

